Download or read book Measurements in a Two dimensional Turbulent Jet written by Gunnar Heskestad and published by . This book was released on 1962 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary results of measurements on a two-dimensional turbulent jet are reported. The measurements were made with a constant temperatuer hot-wire set in a region far enough downstream to be approximately self-preserving. The results include the lateral distributions of mean streamwise velocity, together with r.m.s. components fluctuating velocities and Reynolds shear stress, in coordinates oriented along the streamlines and perpendicular to them. The results are preliminary to the extent of needing corrections for non-linear effects of the hot-wire.

Download or read book Turbulent Structure in a Two dimensional Jet written by Walter C. Mih and published by . This book was released on 1970 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbulence Measurements of a Two dimensional Helium Jet in a Moving Airstream written by Paul Ralph Anderson and published by . This book was released on 1977 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of the streamwise velocity component and the concentration of helium are made in a two-dimensional helium jet discharging into a moving airstream. The transverse distribution of the unconditioned and conditioned statistics of the velocity and helium concentration at various downstream positions are presented. In addition, range conditioned point statistics provide information on the structure of turbulent zones of various durations. The gross properties of the jet agree with previous data. Entrainment is found to occur on the leeward edges of the turbulent zones; because the turbulent fluid is moving faster than the external stream these edges are on the upstream end of the zones. The interfaces as given by the velocity and concentration cannot be distinguished and are found to be relatively thicker than previously measured temperature interfaces. (Author).

Download or read book On the Two Dimensional Turbulent Jet written by I. Wignanski and published by . This book was released on 1973 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results from hot wire measurements in a plane incompressible jet are reported. The flow was found to be self preserving at distances greater than 40 diameters and measurements were made beyond 120 diameters. The quantities measured include mean velocities, turbulence intensities, third and fourth order terms, as well as two point correlations and intermittency. Conditional sampling techniques were used to obtain data exclusively with the turbulent zone of the jet. The results are compared with previous investigations. This is a third paper in a sequel which provides data on turbulent free shear flows. (Author).

Download or read book Dynamics of Quasi two dimensional Turbulent Jets written by Julien Rémy Dominique Gérard Landel and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of quasi-two-dimensional turbulent jets is relevant to chemical reactors, the coking process in oil refinement, as well as rivers flowing into lakes or oceans. In the event of a spillage of pollutants into a river, it is critical to understand how these agents disperse with the flow in order to assess damage to the environment. For such flows, characteristic streamwise and cross-stream dimensions can be much larger than the fluid-layer thickness, and so the flow develops in a confined environment. When the distance away from the discharge location is larger than ten times the fluid-layer thickness, the flow is referred to as a quasi-two-dimensional jet. From experimental observations using dyed jets and particle image velocimetry, we find that the structure of a quasi-two-dimensional jet consists of a high-speed meandering core with large counter-rotating eddies developing on alternate sides of the core. The core and eddy structure is self-similar with distance from the discharge location. The Gaussianity of the cross-stream distribution of the time-averaged velocity is due, in part, to the sinuous instability of the core. To understand the transport and dispersion properties of quasi-two-dimensional jets we use a time-dependent advection--diffusion equation, with a mixing length hypothesis accounting for the turbulent eddy diffusivity. The model is supported by experimental releases of dye in jets or numerical releases of virtual passive tracers in experimentally-measured jet velocity fields. We consider the statistical properties of this flow by releasing and then tracking large clusters of virtual particles in the jet velocity field. The probability distributions of two-point properties (such as the distance between two particles) reveal large streamwise dispersion. Owing to this streamwise dispersive effect, a significant amount of tracers can be transported faster than the speed predicted by a simple advection model. Using potential theory, we determine the flow induced by a quasi-two-dimensional jet confined in a rectangular domain. The streamlines of the induced flow predicted by the theory agree with experimental measurements away from the jet boundary. Finally, we investigate the case of a quasi-two-dimensional particle-laden jet. Depending on the bulk concentration of dense particles, we identify different flow regimes. At low concentrations, the jet features the same core and eddy structure observed without the particles, and thus quasi-two-dimensional jet theory can apply to some extent. At larger concentrations, we observe an oscillating instability of the particle-laden jet.

Download or read book Self Preserving Two dimensional Turbulent Jets and Wall Jets in a Moving Stream written by Rajnikant Purshottam Patel and published by . This book was released on 1961 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Streamwise Development of Two dimensional Wall Jets and Other Two dimensional Turbulent Shear Flows written by Ian S. Gartshore and published by . This book was released on 1965 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The two dimensional turbulent jet written by אפהים גותמרכ and published by . This book was released on 1970 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbulence Measurements and Flow Modeling written by Ching Jen Chen and published by CRC Press. This book was released on 1987 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Theory of Turbulent Jets written by Genrikh Naumovich Abramovich and published by Mit Press. This book was released on 1963 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author's first monograph on turbulent jets, in 1936, dealt solely with a free submerged jet. Since that time, the theory of the turbulent jet has been developed in many published works both in the USSR and abroad: it has been enriched with a large amount of experimental material and has been applied in many new fields of engineering. In the last 10 years very substantial progress has been made, and it has now become possible to go beyond the free submerged jet and to solve the problem of a jet in a stream of fluid, to take into account the interaction between the jet and solid walls, to ascertain the relationship between the contour of the jet and the ratio of its density to the density of the surrounding medium, and to establish the characteristic features of a supersonic jet. This monograph contains the results of further research by the author and his colleagues, as well as a critical reappraisal of the more important theoretical and experimental data published by other investigators. The first section deals with the theory of a turbulent jet of incompressible fluid. It gives a systematic analysis of numerous experimental data on velocity profiles, temperature, and the impurity concentration, as well as the outlines of the turbulent mixing lone. The second section sets forth the theory of turbulent gas jets, including strongly preheated and supersonic jets. The theory of free turbulence in a gas, suitable in principle for any degree of compressibility, is revised, and the equations are derived for motion and heat exchange in the boundary layer of a jet at very high temperature. The third section solves several problems of the spreading of jets in finite and semifinite space, and the fourth section describes various applications of the theory of jets, many of which are reported for the first time or have been significantly revised.

Download or read book Turbulent Buoyant Jets and Plumes written by Wolfgang Rodi and published by Elsevier. This book was released on 2014-05-09 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Science & Applications of Heat and Mass Transfer: Reports, Reviews, & Computer Programs, Volume 6: Turbulent Buoyant Jets and Plumes focuses on the formation, properties, characteristics, and reactions of turbulent jets and plumes. The selection first offers information on the mechanics of turbulent buoyant jets and plumes and turbulent buoyant jets in shallow fluid layers. Discussions focus on submerged buoyant jets into shallow fluid, horizontal surface or interface jets into shallow layers, fundamental considerations, and turbulent buoyant jets (forced plumes). The manuscript then examines a turbulence model for buoyant flows and its application to vertical buoyant jets, including mathematical model, calculation of vertical buoyant jets, and explanation of velocity and temperature spreading in pure jets and pure plumes. The publication is a dependable reference for scientists and readers interested in turbulent buoyant jets and plumes.

Download or read book Laser Doppler Measurements of Turbulence in a Two dimensional Wall Jet on a Flat Plate in Stagnant Surroundings written by Mark Edward Schneider and published by . This book was released on 1987 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coherent Structures in the Similarity Region of a Two Dimensional Turbulent Jet A Vortex Street written by James Walter Oler and published by . This book was released on 1980 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characteristics of the coherent structures of a plane jet were evaluated experimentally and with a kinematic numerical representation. Distributions of intermittency and interface crossing frequency were measured for 10 less than or equal to x/D less than or equal to 60. These properties, including the maximum interface crossing frequency, were found to scale as self-preserving flow variables. Spatially coherent patterns within the turbulent velocity field were evaluated utilizing two point velocity correlation measurements. From these, it was found that the instantaneous velocity fluctuation distributions are antisymmetric with respect to the centerline and coherent over the entire width of the flow field. In addition, the patterns are periodic in the streamwise direction. The two-dimensionality of the large structures was evaluated through the comparison of longitudinal and vertical integral length scales derived from correlations in both the fully turbulent zone and the intermittent region.

Download or read book Turbulence Measurements of a Slightly Heated Two dimensional Helium Jet in a Moving Airstream written by Annick Fraissinet and published by . This book was released on 1979 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis of Two dimensional Turbulent Jet in the Vicinity of Oriface written by S. R. Samanta and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Bubble Entrainment in Free Surface Turbulent Shear Flows written by Hubert Chanson and published by Elsevier. This book was released on 1996-10-11 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book develops an analysis of the air entrainment processes in free-surface flows. These flows are investigated as homogeneous mixtures with variable density. Several types of air-water free-surface flows are studied: plunging jet flows, open channel flows, and turbulent water jets discharging into air. Experimental observations reported by the author confirm the concept that the air-water mixture behaves as a homogeneous compressible fluid in each case. This book will be of great interest to professionals working in many fields of engineering: chemical, civil, environmental, mechanical, mining, metallurgy, and nuclear. Covers new information on the air-water flow field: air bubble distributions, air-water velocity profiles, air bubble sizes and bubble-turbulence interactions Features new analysis is developed for each flow configuration and compared successfully with model and prototype data Includes over 372 references and more than 170 figures with over 60 photographs Presents useful information for design engineers and research-and-development scientists who require a better understanding of the fluid mechanics of air-water flows

Download or read book Two dimensional Jet Interaction with a Mach 4 Mainstream written by Michael J Werle and published by . This book was released on 1970 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes the results of an experimental study concerning the injection of a gaseous secondary jet into an unbounded supersonic flow field which was uniform outside of a turbulent boundary layer. The investigation was principally concerned with the definition of the proper scale length to be associated with turbulent two-dimensional jet-interaction flows. In support of this objective, results are presented for a Mach 4 test conducted using a flat-plate model containing a sonic secondary jet directed normal to the mainstream. Secondary jet strengths were varied from approximately 0 to 1000 for jet throat sizes of 0.005 inch, 0.020 inch and 0.030 inch. The jet interaction phenomenon was studied using detailed surface pressure distributions measured fore and aft of the secondary jet in conjunction with comprehensive shadowgraph coverage of the interaction flow field. (Author).